Title:
OPTICAL ADHESIVE SHEET FOR FOLDABLE DEVICE
Document Type and Number:
Japanese Patent JP2022116859
Kind Code:
A
Abstract:
To provide an optical adhesive sheet for a foldable device which secures reworkability of sticking to an adherend, and is suitable for suppressing peeling from a folded adherend.SOLUTION: An optical adhesive sheet S (optical adhesive sheet for foldable device) has an adhesive layer 10. The adhesive layer 10 has a shear storage elastic modulus at 25°C of 20-50 kPa. The adhesive layer 10 has a first adhesive force Xa at 25°C with respect to the adherend after first standing at 25°C for 2 minutes after sticking to the adherend. The adhesive layer 10 has a second adhesive force Xb at 25°C with respect to the adherend after a heat pressure treatment at 50°C and 0.5 MPa for 15 minutes after sticking to the adherend and second standing at 25°C for 72 hours after the heat pressure treatment. The first adhesive force Xa and the second adhesive force Xb satisfy 2.2≤Xb/Xa≤5.SELECTED DRAWING: Figure 1
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Inventors:
NAGATA TAKUYA
TAKARADA SHO
NODA MINAKO
TAKARADA SHO
NODA MINAKO
Application Number:
JP2021013257A
Publication Date:
August 10, 2022
Filing Date:
January 29, 2021
Export Citation:
Assignee:
NITTO DENKO CORP
International Classes:
C09J7/38; C09J133/04
Attorney, Agent or Firm:
Hiroyuki Okamoto
Shinichi Uda
Shinichi Uda
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